Answer:
$18,800.
Step-by-step explanation:
To know the net book value of the van on the disposal date, we need to calculate the accumulated depreciation first. The annual depreciation expense is calculated as below:
Annual depreciation = (Original cost - Salvage value)/Useful life
= (46,400 - 5,000)/6.
= 6,900
Accumulated depreciation after 4 years = 6,900 x 4 = 27,600
Net book value on disposal date = Original cost - Accumulated depreciation = 46,400 - 27,600 = $18,800.